Battery holder

A array holder is one or added compartments or accommodation for captivation a battery. For dry cells, the holder accept to aswell accomplish electrical acquaintance with the array terminals. For wet cells, cables are generally affiliated to the array terminals, as is begin in automobiles or emergency lighting equipment.

A array holder is either a artificial case with the appearance of the apartment molded as a alcove or compartments that accepts a array or batteries, or a abstracted artificial holder that is army with screws, eyelets, glue, double-sided tape, or added means. Array holders may accept a lid to absorb and assure the batteries, or may be closed to anticipate accident to chip and apparatus from array leakage. Coiled bounce wire or collapsed tabs that columnist adjoin the array terminals are the two a lot of accepted methods of authoritative the electrical affiliation central a holder. External access on array holders are usually fabricated by contacts with pins, apparent arise feet, adhesive lugs, or wire leads.

Where the array is accepted to endure over the activity of the product, no holder is necessary, and a tab anchored to the array terminals can be anon anchored to a printed ambit board.

History

In the backward 1800s patents were issued for customer articles like flashlights; apparent no. 617592 anachronous March 1898 is for an aboriginal metal flashlight that accustomed D batteries.

concept account for C array holder design

Battery holders with burden contacts

Some aboriginal 1900s array holders were generally no added than a agenda box with chestnut contacts. By the 1920s, array holders acclimated accompanying metal clips (like agglutinate holders) to authority the array in abode while authoritative electrical contact. Apparent no. 1439429 was accepted in Dec., 1922 for an accumulation with two bounce arm clips, a baby about-face and a lamp accumulation on the end of affiliated wires.

The addition of polypropylene in the 1950s and miniature batteries by Eveready accustomed for the use of baby artificial array holders. These are still accepted in toys, decorations, and afire or blinking items. In 1957, electric wrist watches acquired acceptance with the public.

Battery holders developed in alongside with batteries over time; as array amalgamation sizes diminished so did the holders. In the 1980s, the aboriginal ambit lath ascent lithium bread corpuscle array holders appeared in the anatomy of apparent no. 4487820 by the array holder architect MPD.

The electronics industry now uses abounding apparent army lithium array holders or sockets. CR2/3A, CR1/2AA and CR123A batteries began in camera applications, but broadcast into new markets like anxiety systems, duke captivated computers, and keyfobs.

Design considerations

Design of the array holder requires ability of how and area the beyond artefact will be used. Human factors to be advised cover affluence of array exchange, age ambit and concrete action of the advised user. These elements accept to be taken into annual for a architecture to be acknowledged and are allotment of the architecture process. A artist accept to baddest amid a array holder molded into the artefact case or fabricated as a abstracted part. For abounding articles regulations and artefact assurance standards affect the array holder selection.

Most accepted array holders are fabricated with polypropylene or nylon bodies rated for 80-100°C. Lithium bread corpuscle holders are fabricated with top temperature PBT, nylon or LCP bodies because they commonly are ambit lath army and crave beachcomber soldering at 180-240°C or reflow soldering at 260-300°C.

Battery contacts are the a lot of important allotment of the architecture and crave austere consideration. Back batteries are nickel plated, it is recommended the contacts be nickel argent to anticipate active corrosion1 amid antithetical metals. Array contacts2 may be anchored contacts, adjustable contacts, or some aggregate of the two.

Fixed contacts3 are bargain but decumbent to accident of electrical connection. Aggregate of anchored and adjustable contacts are a bigger solution, but this is accountable to an accessible ambit aloft movement in the administration abroad from the anchored position; the bounce acquaintance compresses and allows the array to move abroad from the anchored contact. A adjustable acquaintance allows for slight amplification of the corpuscle on discharge, as centralized chemicals access in volume. Adjustable contacts with assorted fingers affecting the anode and cathode acquiesce for movement in assorted admonition after accident electrical connection.

Features like polarity, or about-face battery, aegis can be allotment of the design. The acquaintance for the anode ancillary can be recessed abaft artificial and accept a array nub accepted on Alkaline batteries. Another adjustment is a artificial approach to accept a array column or terminal. In July 2010, Microsoft appear its affairs to accomplice with several added companies4, including Duracell and MPD, to advance its apparent no. 2007/0275299 A1, which is a new affectionate of polarity aegis in which a array can be amid into a array holder in either acclimatization and still accomplish properly. Although added technologies accept existed which could do this, they were big-ticket or acquired a acquiescent activity cesspool on the battery, admitting this band-aid is absolutely automated and affordable to produce.

Battery types such as the 9-volt accept snap-on contacts.

Battery holders for zinc-air batteries accept to not be absolutely air-tight back about 1 litre of air is appropriate per ampere-hour of acquittal per cell. The array holder may cover a valve chip with the accessory ability about-face to acquiesce air to be accepted if the accessory is switched on.5

Environmental effects

There is a lot of ambiguity as to the furnishings of array holders and batteries on the environment. The agitation is evolving alongside developments in ecology awareness, such as apropos over all-around abating and e-waste. There are apropos that devices, such as corpuscle phones and iPods, are heavily accidental to this through their use of anchored in batteries, which could be fabricated disposable and accordingly replaceable. This could advance the activity of anniversary assemblage while abbreviation the bulk of e-waste generated.